Desarrollo de películas adsorbentes y fotocatalíticas de TiO2-acetato de celulosa

Sofía Estrada Flores; María Fernanda Herrera Pérez; Mariana Avalos Cárdenas; Antonia Martínez-Luévanos; Elsa Nadia Aguilera González

doi:10.29057/aactm.v11i11.13384

Sofía Estrada Flores Autonomous University of Coahuila https://orcid.org/0000-0003-4706-3984
María Fernanda Herrera Pérez Autonomous University of Coahuila https://orcid.org/0009-0000-8000-3778
Mariana Avalos Cárdenas Autonomous University of Coahuila https://orcid.org/0009-0000-9706-2352
Antonia Martínez-Luévanos Autonomous University of Coahuila https://orcid.org/0000-0003-3499-1693
Elsa Nadia Aguilera González Autonomous University of Coahuila https://orcid.org/0000-0002-6289-5992

DOI: https://doi.org/10.29057/aactm.v11i11.13384

Keywords: Cellulose acetate, Adsorption, Anatase, Photocatalysis, Kinetics, Titanium oxide, Removal

Abstract

The objective of this work was to obtain a titanium oxide-cellulose acetate (TiO₂-AC) material in film form, with adsorbent and photocatalytic properties. Methylene blue (AM) dye was used as a model in adsorption and photocatalysis tests under natural solar irradiation. The results of the morphological and optical characterization of the samples indicate that white, flexible and porous films were obtained, with a band gap of 3.15 eV. The results of the chemical and structural characterization indicate that the film is a TiO₂-AC composite, resulting from the interaction between the acetyl groups of the polymer and the tinalol group of TiO₂. The evaluation results of TiO₂ nanoparticles and TiO₂-AC film indicate that AM adsorption is well modeled by the Langmuir isotherm. The values of the AM removal rate constants are higher by an order of magnitude than the values of the photodegradation rate constants, due to the dual adsorbent/photocatalyst functionality of both samples.

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Development of adsorbent and photocatalytic films of TiO2-cellulose acetate

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